Miniport to tv stopped working....help!

I have a Macbook Pro that is about 5 months old. We have been hooking it up to our tv via the miniport. It has been working great, until now. A couple of weeks ago when we hooked up the cables like always, nothing happened. We went to "detect displays" in system preferences, but nothing happened. It was as if the cable was not hooked up at all. Anyway, later that night we tried again and it worked fine. (We also tried re-hooking all the cables, re-starting).
Now it has happened again. It is as if the miniport has quit working. Is there anyway to check it without taking it into repair? (Also, we do not think it is the cords, as the tv recognizes when it is hooked to the computer and when it is not.)
I really miss watching Hulu with the whole family on the TV!!

Hi,
Please try to hit F4 to see how it goes.
Regards.
BH
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Miniport to tv stopped working....help!

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